ENGL Tube Poweramp E840/50 preset

Verified · 90/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The ENGL E840/50 is a German stereo tube power amp with two identical 50-watt sides, each with its own ECC83 input and phase inverter stages driving a pair of 5881s. Footswitchable volume and presence settings make it a common partner for ENGL rack preamps.

• Made in: Germany
• Wattage: 100W
• Channels: 1
• Preamp tubes: 3× ECC83
• Power tubes: 4× 5881

Tags: german, power-amp, stereo, 6l6, high-wattage.

Schematic-derived preset files for 16 Fractal and Line 6 modelers: Axe-Fx II/XL/XL+, Axe-Fx III, FM3, FM9, and the full Helix family (Floor, LT, Rack, HX Stomp, HX Stomp XL, Native).

Gridleak extracts amp parameters from original circuit schematics using AI vision — component values, gain staging, tone stack topology, tube types — then generates native preset files for every supported modeler. Every extraction is scored 0–100 and the score is published.